Volume 449, Number 2, April II 2006
|Page(s)||641 - 643|
|Section||Interstellar and circumstellar matter|
|Published online||21 March 2006|
Very high energy γ ray absorption by the galactic interstellar radiation field
Key laboratory of particle astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, PO Box 918-3, Beijing 100049, PR China
Accepted: 14 December 2005
Aims.We calculate the attenuation of very high energy γ rays from Galactic sources.Methods.A recent calculation of the Galactic interstellar radiation field shows that the infra-red radiation background near the Galactic Center is very intense. The attenuation of very high energy γ rays by this radiation is strong and occurs at lower energies than previously thought.Results.Our result shows that the cutoff of the high energy γ ray spectrum begins at about 20 TeV and reaches about 10% for 50 TeV γ rays.
© ESO, 2006
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.